corkscrew

The term "corkscrew" in roller coaster design refers to a specific type of inversion where the track twists in a spiral, similar to the thread of a screw. This design element allows for 360-degree rolls, adding a significant thrill to the ride.12

The origins of roller coasters can be traced back to 15th-century Russia with ice sledding on steep hills. These "flying mountains" evolved with wheeled carriages on grooved tracks in St. Petersburg by 1784. By the 19th century, adaptations in France and the United States led to the development of modern roller coasters, incorporating features like continuous tracks and powered lifts.3

Early roller coasters relied on gravity, converting potential energy from an initial climb into kinetic energy for the ride. Modern designs utilize tubular steel rails and nylon wheels for smoother rides and incorporate elements like inverted loops, barrel rolls, and banked turns to create g-forces that press riders into their seats or provide a sense of weightlessness. The first corkscrew coaster, featuring 360-degree rolls, appeared in 1975.2